US8226759B2 - Ink composition of inkjet recording and method thereof - Google Patents
Ink composition of inkjet recording and method thereof Download PDFInfo
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- US8226759B2 US8226759B2 US12/647,156 US64715609A US8226759B2 US 8226759 B2 US8226759 B2 US 8226759B2 US 64715609 A US64715609 A US 64715609A US 8226759 B2 US8226759 B2 US 8226759B2
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- 0 [1*]C1=C([2*])C(C(=O)C2=C(C)C([6*])=C([5*])C([4*])=C2[3*])=C(C)C([7*])=C1[8*] Chemical compound [1*]C1=C([2*])C(C(=O)C2=C(C)C([6*])=C([5*])C([4*])=C2[3*])=C(C)C([7*])=C1[8*] 0.000 description 25
- XRYPHXQLHGMNGM-UHFFFAOYSA-N C.C.C.C.[H]CCOOC(C)(C#CC(C)(CC(C)C)OCCO[H])CC(C)C Chemical compound C.C.C.C.[H]CCOOC(C)(C#CC(C)(CC(C)C)OCCO[H])CC(C)C XRYPHXQLHGMNGM-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/40—Ink-sets specially adapted for multi-colour inkjet printing
Definitions
- the present general inventive concept relates to an ink composition of inkjet recording, and more particularly, to an ink composition of inkjet recording, wherein the ink composition may prevent low-quality image printing caused by low ink-refill balance in a thermal inkjet recording apparatus.
- an image composed of a plurality of “dots” is recorded by ejecting ink droplets onto a printing medium from nozzles formed on a printhead of an inkjet printer.
- Inkjet printing is less expensive than other printing methods, a printing quality is high, and a color image can be easily formed.
- Ink used in inkjet printing is manufactured by dissolving or dispersing a water-soluble dye or a pigment in a solvent that contains water and selectively a water-miscible organic solvent. If necessary, an additive, for example, a surfactant, may be added to the solvent.
- Inkjet printers may be classified into two types according to an ejection method of the ink droplets.
- a first type is a piezoelectric type that ejects ink by using a piezoelectric device and the second type is a thermal type that ejects ink by using a heat generating device.
- the thermal type inkjet printer includes an inkjet printhead having a heat generating device that is installed in an ink chamber to heat ink and a driving circuit, such as a logic integrated circuit, to drive the heat generation device.
- Ink in the ink chamber generates bubbles by being locally heated by the heat generating device.
- ink droplets are formed in the ink chamber, and are ejected onto a printing medium through nozzles.
- fresh ink In order to fill an empty space generated in the ink chamber due to the ink ejection, fresh ink must be supplied to the ink chamber from an ink tank through a supply line.
- an ink-refill balance is low, low-quality image printing can occur when an image printing operation is consecutively performed.
- a fluidity of the ink in a channel formed between the ink chamber and the ink tank may be improved by modifying a channel structure design or changing a composition of the ink.
- a shortage of ink may occur in the ink chamber.
- a cooling operation of a surface of the inkjet printhead may not be achieved, and thus, a surface passivation layer of the heat generating device may be damaged.
- the damage of the surface passivation layer can cause minute holes in a surface of a resistor, and thus, a lifetime of the resistor is reduced. If ink ejection is performed numerous times, the surface passivation layer may be corroded due to oxidation by cavitation and a chemical reaction with the high temperature ink.
- the corroded surface passivation layer damages an electrical insulating film, and, as a result, a circuit that supplies power to the resistor may be disconnected or a thermal conductivity of the resistor is reduced, thereby reducing a stability of an ink ejection velocity.
- a dot position error reduces the quality of a printed image.
- a volume of the ink droplets is small, the dot position error is easily noticed.
- a lifetime of the inkjet printhead must be increased in order to reduce costs associated therewith.
- ink that is to be supplied to the ink chamber may not be sufficient. In this case, ink droplets ejected on a recording medium may be small and may result in an ejection stability problem due to an excessive heat generated on a surface of the inkjet printhead.
- a dye or a pigment in the channel may be improved to have a high fluidity and a stability or an emulsifying agent or a co-solvent may be employed to improve the ink-refill balance.
- a stability or an emulsifying agent or a co-solvent may be employed to improve the ink-refill balance.
- the present general inventive concept provides an ink composition of inkjet recording, the ink composition having a high ink-refill balance.
- the present general inventive concept also provides an ink composition of inkjet recording whereby ink droplets may be consecutively ejected for an extended period of time by an inkjet recording apparatus.
- the present general inventive concept also provides a multi-color ink set including the ink composition.
- the present general inventive concept also provides a cartridge to inkjet record, the cartridge including multi-color ink sets.
- the present general inventive concept also provides an inkjet recording apparatus having the cartridge to inkjet record.
- Exemplary embodiments of the present general inventive concept may be achieved by providing an ink composition of inkjet recording, the ink composition including at least one surfactant including a benzophenone polyoxyethylene glycol-based compound as illustrated in Chemical Formula 1, a colorant, and a solvent.
- the ink composition including at least one surfactant including a benzophenone polyoxyethylene glycol-based compound as illustrated in Chemical Formula 1, a colorant, and a solvent.
- the content of the benzophenon polyoxyethylene glycol-based compound may be about 0.1 to about 20 parts by weight, the content of the colorant may be about 0.1 to about 15 parts by weight, and the content of the solvent may be about 70 to about 90 parts by weight respectively based on 100 parts by weight of a total weight of the ink composition.
- the surfactant may further include at least one compound selected from compounds represented by Chemical Formula 2 through 5 illustrated below in a content of about 0.1 to about 15 parts by weight based on 100 parts by weight of a total weight of the ink composition.
- R 21 , R 22 , R 23 , R 24 , and R 25 may each independently be hydrogen, halogen, a carboxyl group, a cyano group, an amino group, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-C20 alkoxy group, a substituted or unsubstituted C1-C20 hetero-alkyl group, a substituted or unsubstituted C6-C30 aryl group, or a substituted or unsubstituted C4-C30 heteroaryl group.
- X 2 is a simple bond, oxygen, sulphur, NR 26 , a substituted or unsubstituted C1-C20 alkylene group, a substituted or unsubstituted C1-C20 hetero-alkylene group, a substituted or unsubstituted C6-C30 arylene group, a substituted or unsubstituted C4-C30 heteroarylene group, a substituted or unsubstituted C2-C20 alkenylene group, a substituted or unsubstituted C2-C20 hetero-alkenylene group, a substituted or unsubstituted C3-C30 cycloalkylene group, a substituted or unsubstituted C7-C30 aralkylene group, a carbonyl group, or an ester group, and R 26 indicates hydrogen, halogen, substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-
- I 2 and n 2 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer larger than 1.
- R 31 and R 32 are each independently the same as R 21
- X 3 is the same as X 2
- I 3 and n 3 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer greater than 1.
- R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , R 48 , R 49 , R 50 , R 51 , and R 52 are respectively independently the same as R 21
- X 41 and X 42 are each independently the same as X 2
- I 4 and n 4 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer larger than 1.
- R 56 , R 57 , R 58 , R 59 , R 60 , and R 61 are each independently the same as R 21
- Z 5 is the same as R 21
- X 51 , X 52 , X 53 and X 54 are each independently the same as X 2
- k 5 , I 5 , m 5 , and n 5 are respectively independently an integer of 0 to 100, and at leas of them is 1 or an integer greater than 1.
- the surfactant may further include the compound represented by Chemical Formula 4.
- the ink composition may have a viscosity of about 1.5 to about 20 cps.
- the ink composition may have a dynamic surface tension of about 20 to about 40 dyne/cm at 0 Hz, and a difference between the dynamic surface tension at 0 Hz and that of at 15 Hz may be 0 to about 30 dyne/cm.
- Exemplary embodiments of the present general inventive concept may also be achieved by providing a multi-color ink set that includes the ink composition described above, wherein the multi-color ink set includes at least two ink compositions having colors different from each other.
- Exemplary embodiments of the present general inventive concept may also be achieved by providing a cartridge for inkjet recording, the cartridge includes the multi-color ink set described above.
- Exemplary embodiments of the present general inventive concept may also be achieved by providing an inkjet recording apparatus having the cartridge for inkjet recording described above.
- Exemplary embodiments of the present general inventive concept may also be achieved by providing a method of manufacturing an ink composition of inkjet recording, the method includes combining at least one surfactant containing benzophenone polyoxyethylene glycol-based compound as illustrated in Chemical Formula 1 below, a colorant, and a solvent.
- a content of benzophenon polyoxyethylene glycol-based compound may be about 0.1 to about 20 parts by weight, a content of the colorant is about 0.1 to about 15 parts by weight, and a content of the solvent is about 70 to about 90 parts by weight respectively based on 100 parts by weight of a total weight of the ink composition.
- the surfactant may further include at least one compound selected from the group consisting of compounds represented by Chemical Formula 2 through 5 illustrated below in a content of about 0.1 to about 15 parts by weight based on 100 parts by weight of a total weight of the ink composition.
- R 21 , R 22 , R 23 , R 24 , and R 25 are each independently hydrogen, halogen, a carboxyl group, a cyano group, an amino group, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-C20 alkoxy group, a substituted or unsubstituted C1-C20 hetero-alkyl group, a substituted or unsubstituted C6-C30 aryl group, or a substituted or unsubstituted C4-C30 hetero-aryl group,
- X 2 is a single bond, oxygen, sulphur, NR 26 , a substituted or unsubstituted C1-C20 alkylene group, a substituted or unsubstituted C1-C20 hetero-alkylene group, a substituted or unsubstituted C6-C30 arylene group, a substituted or unsubstituted C4-C30 heteroarylene group, a substituted or unsubstituted C2-C20 alkenylene group, a substituted or unsubstituted C2-C20 hetero-alkenylene group, a substituted or unsubstituted C3-C30 cycloalkylene group, a substituted or unsubstituted C7-C30 aralkylene group, a carbonyl group, or an ester group, and R 26 is hydrogen, halogen, substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-
- I 2 and n 2 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer greater than 1.
- R 31 and R 32 are each independently the same as R 21 ,
- X 3 is the same as X 2 , and
- I 3 and n 3 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer greater than 1.
- R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , R 48 , R 49 , R 50 , R 51 , and R 52 are each independently the same as R 21 ,
- X 41 and X 42 are each independently have definition the same as X 2 , and
- I 4 and n 4 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer greater than 1.
- R 56 , R 57 , R 58 , R 59 , R 60 , and R 61 are each independently the same as R 21 ,
- Z 5 is the same as R 21 ,
- X 51 , X 52 , X 53 and X 54 are each independently the same as X 2 , and
- k 5 , I 5 , m 5 , and n 5 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer greater than 1.
- the surfactant may further include the compound of Chemical Formula 4.
- the ink composition may have a viscosity of about 1.5 to about 20 cps.
- the ink composition may have a dynamic surface tension of about 20 to about 40 dyne/cm at 0 Hz, and a dynamic surface tension difference between a dynamic surface tension at 15 Hz and that of at 0 Hz is 0 to about 30 dyne/cm.
- the colorant may be a dye, a pigment, or a self-dispersing type pigment.
- FIG. 1 is a perspective view of an inkjet recording apparatus having an ink cartridge containing an ink composition according to an exemplary embodiment of the present general inventive concept;
- FIG. 2 is a cross-sectional view of an inkjet printer cartridge containing an ink composition according to an exemplary embodiment of the present general inventive concept
- FIG. 3 is a graph illustrating measurement results of dynamic surface tension of ink compositions according to examples of the present general inventive concept and comparative examples
- An ink composition of inkjet recording has an improved ink-refill balance characteristic, thereby improving a stability of ink droplet ejection and an image quality of an inkjet recording apparatus.
- the ink composition includes at least one surfactant including a benzophenone polyoxyethylene glycol-based compound of the following Chemical Formula 1, a colorant, and a solvent.
- the polyoxyethylene glycol-based compound may include a hydrophilic group and a hydrophobic group.
- Aryl-based moieties of the hydrophobic group structurally have compatibility with an aryl-based structure of a dye and a pigment structure, and the hydrophilic groups of the X1 and X2 have compatibility with water and a water-miscible organic solvent. Therefore, a difference between a highest dynamic surface tension value and a lowest dynamic surface tension value is small, and thus, the fluidity of the ink may be increased.
- the surfactant may further include at least one selected from compounds represented by Chemical Formulae 2 through 5, besides the compound of Chemical Formula 1.
- R 21 , R 22 , R 23 , R 24 , and R 25 may each independently be hydrogen, halogen, a carboxyl group, a cyano group, an amino group, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-C20 alkoxy group, a substituted or unsubstituted C1-C20 hetero-alkyl group, a substituted or unsubstituted C6-C30 aryl group, or a substituted or unsubstituted C4-C30 heteroaryl group.
- X 2 is a simple bond, oxygen, sulphur, NR 26 , a substituted or unsubstituted C1-C20 alkylene group, a substituted or unsubstituted C1-C20 hetero-alkylene group, a substituted or unsubstituted C6-C30 arylene group, a substituted or unsubstituted C4-C30 heteroarylene group, a substituted or unsubstituted C2-C20 alkenylene group, a substituted or unsubstituted C2-C20 hetero-alkenylene group, a substituted or unsubstituted C3-C30 cycloalkylene group, a substituted or unsubstituted C7-C30 aralkylene group, a carbonyl group, or an ester group, and R 26 is hydrogen, halogen, substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-
- I 2 and n 2 may each independently be an integer of 0 to 100, and at least one of them is 1 or an integer greater than 1.
- R 31 and R 32 may each independently be the same as R 21 , and X 3 is the same as X 2 .
- I 3 and n 3 are each independently an integer of 0 to 100, and at least one of them is an integer greater than 1.
- R 41 , R 42 , R 43 , R 44 , R 45 , R 46 , R 47 , R 48 , R 49 , R 50 , R 51 , and R 52 may each independently be the same as R 21
- X 41 and X 42 are each independently the same as X 2
- I 4 and n 4 are each independently an integer of 0 to 100, and at least one of them is 1 or an integer greater than 1.
- R 56 , R 57 , R 58 , R 59 , R 60 , and R 61 may each independently be the same as R 21
- Z 5 is the same as R 21
- X 51 , X 52 , X 53 and X 54 are each independently the same as X 2
- k 5 , I 5 , m 5 , and n 5 are each independently an integer of 0 to 100, and at least one of is 1 or an integer greater than 1.
- the surfactant may further include a compound of Chemical Formula 4, besides the compound of Chemical Formula 1. More specifically, the surfactant of Chemical Formula 4 may be a compound of Chemical Formula 6.
- n and I are each an integer of 1 to 30, and the sum of n+I is an integer of 2 to 50.
- each substituent used in the definition described above may be defined as follows.
- alkyl group refers to a linear or branched monovalent saturated hydrocarbon moiety having carbon atoms of 1 to 20, specifically, 1 to 10, and more specifically, 1 to 6. At least one hydrogen atom included in the alkyl group may be substituted by a halogen atom; a hydroxy group; a —SH, a nitro group; a cyano group; a substituted or unsubstituted amino group, such as —NH 2 , —NH(R), or —N(R′)(R′′) where R, R′ and R′′ are each independently a C1-C10 alkyl group; an amidino group; a —NHNH 2 , a hydrazone group; a carboxylic group; a sulfonic acid group; and a phosphoric acid group.
- Exemplary embodiments of the alkyl group include methyl, ethyl, propyl, 2-propyl, n-butyl, iso-butyl, tert-butyl, pentyl, hexyl, dodecyl, fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl, dichloromethyl, trichloromethyl, iodomethyl, and bromomethyl.
- the present general inventive concept is not limited thereto.
- alkoxy group refers to a linear or branched monovalent ether type oxygen-containing saturated hydrocarbon moiety having carbon atoms of 1 to 20, specifically, 1 to 10, and more specifically, 1 to 6.
- exemplary embodiments of the alkoxy group include methoxy, ethoxy, propoxy, and butoxy such as t-butoxy.
- the alkoxy group may provide a haloalkoxy group by being further substituted by at least one halogen atom such as fluoro, chloro, or bromo.
- Exemplary embodiments of the haloalkoxy group include fluoromethoxy, chloromethoxy, trifluoromethoxy, fluoroethoxy, and fluoropropoxy.
- the present general inventive concept is not limited thereto. That is, in an exemplary embodiment, at least one hydrogen atom of the alkoxy group may be substituted by the same substituent as in the case of the alkyl group.
- aryl group refers to a monovalent monocyclic or a polycyclic aromatic hydrocarbon moiety having carbon atoms of 6 to 30, specifically, 6 to 18, and more specifically, 6 to 12.
- the aromatic moiety of the aryl group includes only carbon atoms.
- Exemplary embodiments of the aryl group include phenyl, tolyl, naphtyl, naphtacenyl, xylyl, biphenyl, anthryl, phenanthrenyl, anthracenyl, indenyl, and fluorenyl.
- At least one hydrogen atom of the aryl group may be selectively substituted by an alkyl group having carbon atoms of 1 to 10, in particular, 1 to 6, a halogen atom, a hydroxyl group, a —SH, a nitro group, a cyano group, a substituted or unsubstituted amono group, an amidino group, a —NHNH 2 , a hydrazone group; a carboxylic group; a sulfonic acid group; or a phosphoric acid group.
- the present general inventive concept is not limited thereto.
- the “aralkyl group” refers to a monovalent hydrocarbon moiety having carbon atoms of 7 to 30, specifically, 7 to 18, and more specifically, 7 to 13 in which at least one hydrogen atom of the alkyl group defined above in substituted with an aryl group. At least one hydrogen atom in the aralkyl group may be optionally atom by a halogen substituent.
- Specific examples of the aralkyl group include benzyl group and methylene naphtyl group. However, the present general inventive concept is not limited thereto.
- heteroalkyl group or “heteroaryl group” may each be formed by substituting a portion of carbon atoms of a chain that constitutes the alkyl group or the aryl group defined above by hetero atoms such as nitrogen atom, sulphur atom, phosphor atom, or oxygen atom.
- the heteroaryl group may have carbon atoms of 4 to 18, more specifically, 4 to 12, and may include a fused ring.
- At least one hydrogen atom in the heteroalkyl group or heteroaryl group may be selectively substituted by an alkyl group; a halogen atom; a hydroxy group; a —SH, a nitro group; a cyano group; a substituted or unsubstituted amino group; an amidino group; a —NHNH 2 , a hydrazone group; a carboxylic group; a sulfonic acid group; or a phosphoric acid group.
- Exemplary embodiments of the heteroaryl group include pyridyl, imidazolyl, carbazolyl, quinolyl, and indolyl. However, the present general inventive concept is not limited thereto.
- alkylene group refers to a linear or branched divalent saturated hydrocarbon moiety having carbon atoms of 1 to 20, specifically, 1 to 10, and more specifically, 1 to 6. At least one hydrogen atom in the alkylene group may be selectively substituted by an alkyl group; a halogen atom; a hydroxy group; a —SH, a nitro group; a cyano group; a substituted or unsubstituted amino group; an amidino group; a —NHNH 2 , a hydrazone group; a carboxylic group; a sulfonic acid group; or a phosphoric acid group.
- Exemplary embodiments of the alkylene may include methylene, ethylene, propylene, n-butylene, and hexylene. However, the present general inventive concept is not limited thereto.
- the “arylene group” refers to a divalent monocyclic, bicyclic, or tricyclic aromatic hydrocarbon moiety having carbon atoms of 6 to 30, specifically, 6 to 18, and more specifically, 6 to 12. At least one hydrogen atom in the arylene group may be selectively substituted by an alkyl group; a halogen atom; a hydroxy group; a —SH, a nitro group; a cyano group; a substituted or unsubstituted amino group; an amidino group; a —NHNH 2 , a hydrazone group; a carboxylic group; a sulfonic acid group; or a phosphoric acid group. Exemplary embodiments of the arylene group may include phenylene, naphthalenylene, and biphenylene. However, the present general inventive concept is not limited thereto.
- alkenylene group refers to a linear or branched divalent hydrocarbon portion including at least one C—C double bond having carbon atoms of 2 to 20, specifically, 2 to 10, and more specifically, 2 to 6.
- the alkenylene group may be bonded to other moiety through carbon atoms that include the C—C double bond and/or saturated carbon atoms.
- the alkenylene group may be optionally substituted by at least one halogen substituent.
- Exemplary embodiments of the alkenylene group include —CH ⁇ CH—, —CH 2 CH ⁇ CH—, —CH ⁇ C(CH 3 )—, and —CH 2 CH ⁇ CHCH 2 —.
- the present general inventive concept is not limited thereto.
- cycloalkylene group refers to a saturated or unsaturated non-aromatic divalent monocyclic, bicyclic, or tricyclic hydrocarbon moiety having carbon atoms of 3 to 30, specifically, 3 to 10, and more specifically, 3 to 6.
- the cycloalkylene group may be optionally substituted by at least one halogen substituent.
- Exemplary embodiments of the cycloalkylene group include cyclopropylene, cyclobutylene, and cyclopentylene.
- the present general inventive concept is not limited thereto.
- the “aralkylene group” refers to a divalent hydrocarbon moiety having carbon atoms of 7 to 30, specifically, 7 to 18, and more specifically, 7 to 13, which may be formed by substituting at least one hydrogen atom in the alkylene group by an aryl group.
- the aralkylene group may be optionally substituted by at least one halogen substituent.
- Examples of the aralkylene group include benzylene and methylenenaphthalenylene. However, the present general inventive concept is not limited thereto.
- heteroalkylene group “heteroarylene group”, and “heteroalkenylene group” are each formed by substituting a portion of carbon atoms of a chain that constitutes the alkylene group, the arylene group, and the alkenylene group defined above by a hetero atom such as a nitrogen atom, a sulphur atom, a phosphor atom, and an oxygen atom.
- the heteroarylene group can have carbon atoms of 4 to 30, specifically, 4 to 18, and more specifically, 4 to 12.
- At least one hydrogen atom of the heteroalkylene group or the heteroalkenylene group may be selectively substituted by an alkyl group; a halogen atom; a hydroxy group; a —SH, a nitro group; a cyano group; a substituted or unsubstituted amino group; an amidino group; a —NHNH 2 , a hydrazone group; a carboxylic group; a sulfonic acid group; or a phosphoric acid group.
- a “simple bond means a single bond. However, the present general inventive concept is not limited thereto.
- the ink composition of inkjet recording has a dynamic surface tension of about 20 to about 40 dyne/cm, and more specifically, about 30 to about 35 dyne/cm at frequency of 0 Hz. If the dynamic surface tension of the ink composition of inkjet recording is less than about 20 dyne/cm, the ink fluidity is reduced, and thus, a stable image quality is difficult to obtain. If the dynamic surface tension exceeds about 40 dyne/cm, the ink fluidity may be improved, however, the characteristic of an initial ink droplet ejection may be deteriorated.
- the difference between the dynamic surface tension at 15 Hz and at 0 Hz may be 0 to about 30 dyne/cm, and more specifically, about 5 to about 20 dyne/cm. If the dynamic surface tension difference exceeds about 30 dyne/cm, a variation of dynamic surface tension according to a variation of ejection atmosphere is large, and thus, a fluctuation of ink-refill balance may occur. In this case, if the printing operation is consecutively performed for a long period of time, uniform ink droplet ejection and image quality may not be maintained.
- the viscosity of the ink composition for optimal use may be about 1.5 to about 20 cps, and specifically, about 1.5 to about 3.5 at 20° C.
- the content of the polyoxyethyleneglycol-based compound represented by Chemical Formula 1 may be about 0.1 to about 20 part by weight, and specifically, about 1 to about 10 parts by weight, the content of colorant may be about 0.1 to about 15 parts by weight, and the content of the solvent may be about 70 to about 90 parts by weight based on 100 parts by weight of the ink composition. If the content of the polyoxyethyleneglycol-based compound is less than 0.1 parts by weight, the fluidity of ink composition may not be improved, and if the content of the polyoxyethyleneglycol-based compound exceeds 20 parts by weight, the solubility of the ink composition may be reduced and surfaces of the nozzles may be damaged.
- the content of at least one compound selected from the compounds represented by Chemical Formulae 2 through 5 may be about 0.1 to about 15 parts by weight, and specifically, about 0.5 to about 7.5 parts by weight based on 100 parts by weight of the ink composition.
- the ink composition may include at least two surfactants in order to achieve the characteristics as described above and to secure a dispersion stability of the colorant.
- at least one of the surfactants may have a hydrophilic-lipophilic balance (HLB) value of 12 or larger and at least one of the surfactants may have a HLB value less than 12. More specifically, at least one of the surfactants may have a strong hydrophilic property having a HLB value of about 12 to about 20, and at least one of the surfactants may have a weak hydrophilic property having a HLB value between 4 and 12.
- HLB hydrophilic-lipophilic balance
- the HLB value was initially introduced by a research group of Atlas Powder Co., USA, and indicates the “balance” between the hydrophilic portion and the lipophilic portion in a molecule of a surfactant.
- the HLB value varies according to a molecular structure, and is very useful in selecting surfactants.
- the colorant for the ink composition may be a dye, a pigment, or a self-dispersing pigment that may be used in the art, however, the present general inventive concept is not limited thereto. That is, the colorant may be a dye that may be dissolved or dispersed in water, a pigment that may be stably dispersed in water with the aid of a dispersing agent, a self-dispersing pigment that may be stably dispersed without the need of a dispersing agent, and/or a mixture of these materials.
- the dye may include Food Black dyes, Food Red dyes, Food Yellow dyes, Food Blue dyes, Acid Black dyes, Acid Red dyes, Acid Blue dyes, Acid Yellow dyes, Direct Black dyes, Direct Blue dyes, Direct Yellow dyes, anthraquinone dyes, monoazo dyes, disazo dyes, and phthalocyanine derivatives, etc.
- Specific examples of the pigment may include carbon black, graphite, vitreous carbon, activated charcoal, activated carbon, anthraquinone, phthalocyanine blue, phthalocyanine green, diazos, monoazo, pyranthrone, perylene, quinacridone, and indigoid pigments.
- the specific examples of the self-dispersing pigment may include cabojet-series or CW-series of Orient Chemical Industries, Ltd., however, the present general inventive concept is not limited thereto.
- the content of the colorant may be about 0.1 to about 15 parts by weight, and specifically, about 1 to about 10 parts by weight based on 100 parts by weight of the ink composition. If the content of the colorant is less than 0.1 parts by weight, a sufficient color display may not be achieved, and if the content of the colorant exceeds about 15 parts by weight, the ink composition may be uneconomical to manufacture.
- a solvent included in the ink composition may be water, a water miscible organic solvent, or a mixture of these solvents.
- the content of the solvent may be about 70 to about 90 parts by weight based on 100 parts by weight of the ink composition. If the content of the solvent is less than 70 parts by weight, the viscosity of the ink composition may be excessively increased resulting in reduced ejection performance of the ink, and if the content of the solvent exceeds 90 parts by weight, the viscosity of the ink composition is excessively reduced.
- the water-miscible organic solvent may be at least one selected from the group consisting of a monohydric alcohol solvent, a ketone solvent, an ester solvent, a polyhydric alcohol solvent, a derivative of polyhydric alcohol solvent, a nitrogen-containing solvent, a sulfur-containing compound, a dimethylsulfoxide, tetramethylsulfone, and of thioglycol.
- a monohydric alcohol solvent a ketone solvent, an ester solvent
- a polyhydric alcohol solvent a derivative of polyhydric alcohol solvent
- a nitrogen-containing solvent a sulfur-containing compound
- dimethylsulfoxide tetramethylsulfone
- thioglycol thioglycol
- the monohydric alcohol solvent controls a surface tension of the ink, and thus, can enhance a penetrability, a dot forming ability, and a drying property of a printed image on a recording medium, such as a normal sheet of paper or a professional sheet of paper.
- the polyhydric alcohol solvent and its derivative solvents do not easily evaporate and decreases a freezing point of the ink, and as a result, a storage stability of the ink may be increased, thereby preventing plugging of the nozzles.
- the monohydric alcohol solvent includes methyl alcohol, ethyl alcohol, n-propyl alcohol, i-propyl alcohol, n-butyl alcohol, s-butyl alcohol, and t-butyl alcohol, and in particular, ethyl alcohol, i-propyl alcohol, and n-butyl alcohol.
- Specific examples of the polyhydric alcohol solvent include: alkylene glycols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, butylene glycol, and glycerol; polyalkylene glycols such as polyethylene glycol and polypropylene glycol; and thiodigylcols.
- the examples of the derivatives of the polyhydric alcohol include: lower alkylether of the polyhydric alcohol described above, such as ethylene glycol dimethyl ether; and a lower carboxylic acid ester of the polyhydric alcohol described above, such as ethylene glycol diacetate.
- the ketone solvent may include acetone, methyl ethyl ketone, diethyl ketone, and diacetone alcohol.
- Specific examples of the ester solvent include methyl acetate, ethyl acetate, and ethyl lactate.
- the present general inventive concept is not limited thereto.
- the nitrogen-containing solvent as a water miscible organic solvent includes 2 pyrrolidone or N-methyl-2-pyrrolidone, and sulphur-containing solvent include dimethyl sulfoxide, tetramethylene sulfone, and thioglycol.
- sulphur-containing solvent include dimethyl sulfoxide, tetramethylene sulfone, and thioglycol.
- present general inventive concept is not limited thereto.
- the solvent mixture may include a water miscible organic solvent in a ratio of about 0.1 to about 130 parts by weight based on 100 parts by weight of the water. If the ratio of the water miscible organic solvent is less than about 0.1 parts by weight, the surface tension of ink may increase too much, and if the ratio exceeds 130 parts by weight, the viscosity of ink may be increased, thereby reducing an ejection performance of the nozzles.
- the ink composition may further include various additives.
- the ink composition may further include at least one additive selected from the group consisting of a wetting agent, a dispersing agent, other surfactant, a viscosity control agent, a pH controlling agent, or an anti-oxidant.
- the content of the additive may be about 0.1 to about 20 parts by weight, specifically, about 0.1 to about 10 parts by weight based on 100 parts by weight of ink composition.
- the present general inventive concept is not limited thereto.
- a multi-color ink set that includes an ink composition of inkjet recording, wherein the multi-color ink set includes at least two ink compositions having different colors from each other.
- the ink set may be provided to an ink accommodating unit of an inkjet recording apparatus or in an inkjet printer cartridge. That is, the cartridge of the inkjet recording apparatus according to another exemplary embodiment of the present general inventive concept includes a multi-color ink set as described above.
- the inkjet recording apparatus according to another exemplary embodiment of the present general inventive concept includes the cartridge of the inkjet recording apparatus.
- a thermal type inkjet recording apparatus includes a thermal printhead that ejects ink droplets by heating the ink composition in order to generate bubbles.
- a piezo type inkjet recording apparatus includes a piezo printhead that ejects ink droplets by generating a pressure pulse by using a piezo device.
- the inkjet recording apparatus may be a scanning type printer or an array type printer.
- the array type printer may include a plurality of nozzles, and more specifically, more than 10,000 nozzles.
- the inkjet recording apparatus may be used in printing on paper, textiles, or other materials for industrial purposes.
- the inkjet recording apparatuses in which the ink composition according to an exemplary embodiment of the present general inventive concept may be used, but are not limited to the inkjet recording apparatuses as described above and may also be used for various other purposes.
- FIG. 1 is a schematic perspective view of an inkjet recording apparatus 50 having an ink cartridge containing an ink composition according to an exemplary embodiment of the present general inventive concept.
- the inkjet recording apparatus 50 includes an inkjet printer cartridge 11 that contains the ink composition as described above.
- a printer cover 8 is connected to a main body 13 of the inkjet recording apparatus 50 .
- An engaged region of a movable latch 10 protrudes through a hole 7 .
- the movable latch 10 is designed to engage with a fixed latch 9 on the printer cover 8 , and the fixed latch 9 contacts the movable latch 10 on an inner side of the printer cover 8 when the printer cover 8 is closed.
- the printer cover 8 has a recess 14 which corresponds to an engaged portion of the movable latch 10 that extends through the hole 7 .
- the inkjet printer cartridge 11 is mounted within the inkjet recording apparatus 50 so that ink may be disposed on a sheet of paper 3 passing under the inkjet printer cartridge 11 .
- FIG. 2 is a cross-sectional schematic view of the inkjet printer cartridge 11 that includes an ink composition set according to an exemplary embodiment of the present general inventive concept.
- the inkjet printer cartridge 11 includes an ink cartridge main body 110 that forms an ink tank 112 , an inner cover 114 that covers a top region of the ink tank 112 , and an external cover 116 that is separated by a predetermined distance from the inner cover 114 to seal the ink tank 112 and the inner cover 114 .
- the ink tank 112 is divided into a first ink chamber 124 and a second ink chamber 126 by a vertical barrier wall 123 .
- An ink passage 128 is formed on the lowest part of the vertical barrier wall 123 between the first and second ink chambers 124 and 126 .
- Ink fills the first ink chamber 124 and a sponge 129 , and then fills the second ink chamber 126 .
- a vent hole 126 a corresponding to the second ink chamber 126 is formed on the inner cover 114 .
- the vent hole 126 a may be formed thru the inner cover 114 .
- a filter 140 is formed on a lower portion of the second chamber 126 to filter impurities and minute bubbles in ink so as to prevent ejection holes of a printhead 130 from clogging with the impurities and the minute bubbles.
- a hook 142 is formed on an edge of the filter 140 and is located on a top region of a standpipe 132 . Ink in the ink tank 112 is ejected as tiny droplets onto a printing medium through ejection holes of the printhead 130 .
- the present general inventive concept also provides a method of manufacturing the above described ink composition.
- the method of manufacturing the ink composition includes combining at least one surfactant containing benzophenone polyoxyethylene glycol-based compound as illustrated in Chemical Formula 1 below with a colorant and a solvent, as described above.
- Ink compositions for inkjet recording according to the examples 1 through 4 were manufactured by completely mixing components illustrated in the following examples 1 through 4 using a mixer.
- Product NN207 is a non-ionic surfactant manufactured by Hannong Chemical Co. Ltd., Korea, which corresponds to a compound represented by chemical Formula 1 in which R 1 ⁇ R 4 ⁇ R 5 ⁇ R 6 ⁇ R 7 ⁇ R 8 are hydrogen atoms, R 2 ⁇ R 3 are n-nonyl groups, both X 1 and X 2 are (CH 2 CH 2 O)nH, and n indicating the sum of ethylene oxide (EO) residues in X 1 and X 2 is 7.
- NN205 is a non-ionic surfactant manufactured by Hannong Chemical Co.
- FIG. 3 is a graph illustrating measurement results of dynamic surface tensions of ink compositions according to the examples of the present general inventive concept and comparative examples.
- Table 1 summarizes the test results numerically. Referring to Table 1, the dynamic surface tension at bubbling frequency of 0 Hz, the dynamic surface tension at bubbling frequency of 15 Hz, and the difference between the two dynamic surface tensions are illustrated.
- the dynamic surface tension value at a bubbling frequency of 0 Hz indicates a dynamic surface tension value obtained by extrapolating to 0 Hz after measuring dynamic surface tensions at least two points in a low frequency range of 0.1 Hz to 1 Hz.
- the ink compositions according to examples 1 through 4 of the present general inventive concept have reasonable dynamic surface tension values at 0 Hz, the ink compositions have high ink fluidity and high initial ink droplet ejection characteristics.
- the ink compositions according to examples 1 through 4 illustrate dynamic surface tension value differences at 15 Hz and 0 Hz much smaller than the ink compositions according to the comparative examples 1 through 4 respectively corresponding to examples 1 through 4.
- the ink compositions according to examples 1 through 4 have a small dynamic surface tension variation in a frequency range of 0 to 15 Hz, and thus, have a high and stable ink-refill balance. Therefore, even though a printing operation is consecutively performed for a long period of time, the ink compositions according to examples 1 through 4 can maintain uniform ink droplet ejection characteristics and image uniformity.
- Evaluation standard A indicates the number of missing nozzles.
- a same amount of each of the ink compositions according to examples 1 through 4 and the comparative examples 1 through 4 and distilled water were tested in an inkjet printer (MJC-2400C, Samsung electronic Co. Ltd.) having a blade function. Inks were filled in a cartridge ((M-50, Samsung electronic Co. Ltd.) and were kept for one week in an uncapped state. The cartridge was maintenanced using a wet blade function, and afterwards, the test was performed by using a 25% solid pattern.
- Test 4 EO Gap Measuring Test
- Evaluation standard A indicates a nozzle gap between even and odd chips.
- the ink compositions according to the examples 1 through 4 of the present general inventive concept were rarely observed. Also, the ink compositions according to the examples 1 through 4 illustrated good measurement results of EO gap and X-Y alignment, which are methods of evaluating images. In the case of the ink compositions according to the comparative examples 1 through 4, a few cases of missing nozzles and considerable cases of nozzle cloggings were observed.
- the measurement results of EO gap and X-Y alignment which are methods of evaluating images, illustrated deviations from the standard values, and thus, an image failure was observed.
- an ink composition that includes at least one surfactant containing benzophenone polyoxyethylene glycol-based compound of Chemical Formula 1, a colorant agent, and a solvent illustrates an excellent ink-refill balance, and has improved ink fluidity and ejection characteristics, and thus, can achieve a stable and high quality image, even though the ink is ejected for a long period of time.
- an ink composition of inkjet recording that includes the benzophenon polyoxyethylene glycol-based compound has high ink fluidity.
- the ink-refill balance can be improved.
- an ink composition of inkjet recording that includes the benzophenon polyoxyethylene glycol-based compound may uniformly maintain the ejection of ink droplets from an inkjet printhead for a long period of time.
- the uniformity of image quality at a high level can be maintained.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
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KR10-2009-0006609 | 2009-01-28 | ||
KR1020090006609A KR20100087540A (ko) | 2009-01-28 | 2009-01-28 | 잉크젯 기록용 잉크 조성물 |
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US8226759B2 true US8226759B2 (en) | 2012-07-24 |
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US10160969B2 (en) | 2014-01-16 | 2018-12-25 | Wave Life Sciences Ltd. | Chiral design |
US10167309B2 (en) | 2012-07-13 | 2019-01-01 | Wave Life Sciences Ltd. | Asymmetric auxiliary group |
US10280192B2 (en) | 2011-07-19 | 2019-05-07 | Wave Life Sciences Ltd. | Methods for the synthesis of functionalized nucleic acids |
US10307434B2 (en) | 2009-07-06 | 2019-06-04 | Wave Life Sciences Ltd. | Nucleic acid prodrugs and methods of use thereof |
US10329318B2 (en) | 2008-12-02 | 2019-06-25 | Wave Life Sciences Ltd. | Method for the synthesis of phosphorus atom modified nucleic acids |
US10428019B2 (en) | 2010-09-24 | 2019-10-01 | Wave Life Sciences Ltd. | Chiral auxiliaries |
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EP4069691A1 (en) | 2019-12-06 | 2022-10-12 | Vertex Pharmaceuticals Incorporated | Substituted tetrahydrofurans as modulators of sodium channels |
TW202322824A (zh) | 2020-02-18 | 2023-06-16 | 美商基利科學股份有限公司 | 抗病毒化合物 |
CA3216162A1 (en) | 2021-04-16 | 2022-10-20 | Gilead Sciences, Inc. | Methods of preparing carbanucleosides using amides |
CA3221259A1 (en) | 2021-06-04 | 2022-12-08 | Vertex Pharmaceuticals Incorporated | N-(hydroxyalkyl (hetero)aryl) tetrahydrofuran carboxamides as modulators of sodium channels |
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Also Published As
Publication number | Publication date |
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KR20100087540A (ko) | 2010-08-05 |
US20100186626A1 (en) | 2010-07-29 |
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